A Swiss bank has been robbed at gunpoint by two people dressed up as old men.

The thieves wore prosthetic pensioner masks, flat caps and thick-rimmed glasses when they robbed the bank in GraubÃ¼nden, Switzerland.

The pair seemed harmless as they hobbled into the building, but upon reaching the desk they pulled out guns and demanded the clerk hand over the money, reports Metro.

After they received the cash, thought to be a considerable amount, they dashed out of the front door before security guards were able to catch them.

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A police spokesperson said: "They looked old but the masks were obviously identical - they could have been twin grandads.

"We assume they probably took the masks off and blended in with the crowds afterwards, once they had fled from the bank. They ran out so fast that we can quite categorically rule out that they were really OAPs."